While I haven't had it on MY rigs, I've been around rigs with it. Sounds good, and Borla's warranty is killer. Their stuff is always good.
Now, the buts
But... it exits under the bumper, and crushing the tips is NOT under warranty.
But... no JK exhaust REALLY makes more power- they DO reduce weight, however. Your fuel economy and power are unaffected, but you'll think it's faster due to more noise
But... there are other catbacks that are just as good, and a WHOLE LOT cheaper- up to you. I can buy THREE of my Edelbrock systems for the price of one Borla catback, and have money left over! I get a nice sound, a tip that I won't crunch on a rock, less weight, more clearance at the bumper, and money in my pocket. That's a bit insane if you ask me- Mark W.